Tb2k82CE2009-12-27 23:38:41

I have never used the Zip kit, but have done many using NAPA kits, always with good results.  Make sure you get the one with the diodes, bearings, brushes, etc.  It doesn't take any special tools.  It is easier to get the big nut off the pulley with an impact, but it can be done without.  Use a straightened paper clip to hold the brushes back to slip the shaft back in.

Have fun
Larry

Maybe this Casting Code Chart will help unlock the mystery to your question.

                                                                            Tux...

Wow Numbers.  My car is in the shop now so I will have to wait until I get it back to look for the casting number.  Would they be visible without taking the alternator off? 

Hey TUX, I have what I believe to be Original altenator for my 72'. They told me it was WAAAY less expensive to buy a re-built, so I did.  Do you have a list for the 72 codes? I may want to do mine myself and put the Numbered one back on.  TANKS

[QUOTE=manchestershark] Hey TUX, I have what I believe to be Original altenator for my 72'. They told me it was WAAAY less expensive to buy a re-built, so I did.  Do you have a list for the 72 codes? I may want to do mine myself and put the Numbered one back on.  TANKS[/QUOTE]

Ask and ye shall RECEIVE .

                                                                                                      Tux...

IF the alternator is working properly and supplying the correct amperage, you just need the diode trio.   Common problem and not too hard to replace. kstyer2010-01-01 12:20:42

  THANKS to both entrys. I will check out the old one and let you know if it is a good one, original. The one I have is bouncing on the guage . lights, dash lights go from bright to dim.   Mark   Who carries the parts?

Hey Tux, Sure nuff it is the original altenator.  A 61 amp for the air conditioning.  THANKS for the info.   Now I needs parts.  Mark

Try Wilcox Corvette Accessories.